ALTER OUTLINE

Purpose

Note:

Oracle strongly recommends that you use SQL plan management for new applications. SQL plan management creates SQL plan baselines, which offer superior SQL performance stability compared with stored outlines.

You can migrate existing stored outlines to SQL plan baselines by using the LOAD_PLANS_FROM_CURSOR_CACHE or LOAD_PLANS_FROM_SQLSET procedure of the DBMS_SPM package. When the migration is complete, you should disable or remove the stored outlines.

See Also: Oracle Database Performance Tuning Guide for more information about SQL plan management and Oracle Database PL/SQL Packages and Types Reference for information about the DBMS_SPM package

Use the ALTER OUTLINE statement to rename a stored outline, reassign it to a different category, or regenerate it by compiling the outline's SQL statement and replacing the old outline data with the outline created under current conditions.

See Also:

CREATE OUTLINE and Oracle Database Performance Tuning Guide for more information on outlines

Prerequisites

To modify an outline, you must have the ALTER ANY OUTLINE system privilege.

Syntax

alter_outline::=

Description of the illustration alter_outline.gif

Semantics

PUBLIC | PRIVATE

Specify PUBLIC if you want to modify the public version of this outline. This is the default.

Specify PRIVATE if you want to modify an outline that is private to the current session and whose data is stored in the current parsing schema.

outline

Specify the name of the outline to be modified.

REBUILD

Specify REBUILD to regenerate the execution plan for outline using current conditions.

See Also:

"Rebuilding an Outline: Example"

RENAME TO Clause

Use the RENAME TO clause to specify an outline name to replace outline.

CHANGE CATEGORY TO Clause

Use the CHANGE CATEGORY TO clause to specify the name of the category into which the outline will be moved.

ENABLE | DISABLE

Use this clause to selectively enable or disable this outline. Outlines are enabled by default. The DISABLE keyword lets you disable one outline without affecting the use of other outlines.

Example

Rebuilding an Outline: Example The following statement regenerates a stored outline called salaries by compiling the text of the outline and replacing the old outline data with the outline created under current conditions.

ALTER OUTLINE salaries REBUILD;